First question is do you have a blackberry data plan? a lot of carriers block data including WIFI without the proper plan.
Can you do email?
Can you use the browser?
if the answer is no your on a standard cell plan that may include texting and calling only.
If you can do email and browser then it may be a setting.
Check this link
http://btsc.webapps.blackberry.com/b...ListHelperImpl